Constitution and properties of ceramized fireclay refractories: I. Constitution

Chaudhuri, S.; Bhaumik, B. K.

doi:10.1007/bf02744883

Cited by 2 publications

(6 citation statements)

References 4 publications

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“…There was marginal difference in the porosity and bulk density of the compositions belonging to group (A) and group (B) but rise in porosity and fall in bulk density were observed for compositions under group (C) compared to those for compositions under group (A). As it appeared, the compositions 4, 8 and 12, which contained TiO2 as nucleating agent, attained lowest porosity due to their lowest 11 Fireclay + 31.97 1.78 3.0wt.% V20 5 12 Fireclay + 25"50 1.98 10"0 wt.% TiO 2 crystalline phase and highest glassy phase content (Chaudhuri and Bhaumik 1997). The ceramization process did not bring about noteworthy change in porosity and bulk density of the samples.…”

Section: Porosity and Bulk Densitymentioning

confidence: 93%

“…The glass was heat-treated by two different techniques to crystallize it. Though this process could not influence the mineralogical composition of the product significantly, a remarkable change in the microstructure was noted (Chaudhuri and Bhaumik 1997). Further, there appeared no major change in the microstructure of the products subjected to two types of heat-treatment.…”

Section: Introductionmentioning

confidence: 91%

“…Cr203, V205 and TiO 2 were selected as nucleating agents (Chaudhuri and Bhaumik 1997) for this study and were used to the extent of 1, 3 and 10wt.%, respectively.…”

Section: Sample Preparationmentioning

confidence: 99%

“…It was shown earlier (Chaudhuri and Datta 1996a) that the mullite content decreased and glass content increased from the V20 5-to TiOz-nucleated compositions and the Cr203-nucleated compositions fell in between. Despite their low-mullite and highglass concentrations, the TiO2-nucleated compositions achieved highest strength, both cold MOR and hot MOR, due to their microstructure where mullite needles with high aspect ratio were well developed and interlocked and thus reinforced the matrix (Chaudhuri and Bhaumik 1997). The lowest cold strength (cold MOR) of the Cr 2 O3-nucleated compositions was essentially due to their poor microstructure, which was featured by small mullite crystals but separated and thereby failed to reinforce the matrix (Chaudhuri and Bhaumik 1997).…”

Section: Mechanical Strengthmentioning

confidence: 99%

“…Despite their low-mullite and highglass concentrations, the TiO2-nucleated compositions achieved highest strength, both cold MOR and hot MOR, due to their microstructure where mullite needles with high aspect ratio were well developed and interlocked and thus reinforced the matrix (Chaudhuri and Bhaumik 1997). The lowest cold strength (cold MOR) of the Cr 2 O3-nucleated compositions was essentially due to their poor microstructure, which was featured by small mullite crystals but separated and thereby failed to reinforce the matrix (Chaudhuri and Bhaumik 1997). Highest concentration of mullite in the V 2 05nucleated compositions was responsible for their cold strength (cold MOR) to be in between that of TiO 2-and Cr 20 a-nucleated compositions.…”

Section: Mechanical Strengthmentioning

confidence: 99%

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Constitution and properties of ceramized fireclay refractories: II. Properties

Chaudhuri

Bhaumik

1997

Bull Mater Sci

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Low-grade fireclay refractories contain large amounts of glassy phase. The properties, e.g. mechanical strength, thermal-shock resistance, refractoriness-under-load, refractoriness and also porosity and bulk density of these refractories before and after ceramization of their glassy phase were investigated. The glassy phase was ceramized by incorporating Cr 2 0 3, V20 5 and TiO 2 into the refractories as nucleating agents and subsequent heat-treatment. Significant improvement in mechanical strength and thermal-shock resistance of the ceramized refractories was observed.

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Section: Porosity and Bulk Densitymentioning

confidence: 93%

Section: Introductionmentioning

confidence: 91%

“…Cr203, V205 and TiO 2 were selected as nucleating agents (Chaudhuri and Bhaumik 1997) for this study and were used to the extent of 1, 3 and 10wt.%, respectively.…”

Section: Sample Preparationmentioning

confidence: 99%

Section: Mechanical Strengthmentioning

confidence: 99%

Section: Mechanical Strengthmentioning

confidence: 99%

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Constitution and properties of ceramized fireclay refractories: II. Properties

Chaudhuri

Bhaumik

1997

Bull Mater Sci

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Experimental determination of elastic properties of the loose materials in the field of high pressures after heating

Elovenko

Kräusel

2020

J. Phys.: Conf. Ser.

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This article presents a physical study of materials’ elastic response (asbestos, slag microspheres, fireclay and corundum powders) at the pressure up to 70 MPa. The research is carried out after heating the samples up to 500 °C and exposure to crimping pressure up to 105 MPa. The graphical dependencies are given for each materials of relative strain from the pressure level. The original research technique of elastic response for materials samples having a loose aggregate state is proposed in laboratory. This technique is based on the use of a special laboratory equipment relatively simple and efficient design which combines power and measurement components. A detailed description of the scheme and principle of operation equipment is given. The calibration of dynamometer component of the special equipment is carried out and graphs of its work are presented. A technique for calculating the elastic moduli of material samples is proposed. The elastic moduli and the relative residual deformation of the material samples are determined. The ability of materials to preserve their loose properties are studied (dismantling ability). The conclusion about the possibility of using materials in the housing of pressure vessels is made as a means of protecting their load-bearing structural elements from unwanted heating and reducing in their strength characteristics.

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Constitution and properties of ceramized fireclay refractories: I. Constitution

Cited by 2 publications

References 4 publications

Constitution and properties of ceramized fireclay refractories: II. Properties

Constitution and properties of ceramized fireclay refractories: II. Properties

Experimental determination of elastic properties of the loose materials in the field of high pressures after heating

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